What are sectioning roots? Let’s take a look at this HTML5 feature and whether or not sectioning roots are important to your webpages.
Get to the root of it.
Another small performance gain that designers and developers should employ is specifying their image width and height. This article explains why setting the dimensions of your images helps you and the theory behind it. See the best practice.
With Twitter Bootstrap modals in either version 2 or 3, you can easily prevent the modal window from being closed with the escape key or by clicking on the black backdrop outside the window. see the code